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Finding the Fourth Proportional to 20,300.59, 30,448.80 and 5,511

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Solution

The fourth proportional to 20,300.59, 30,448.80 and 5,511 is: 8,265.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,300.59 : 30,448.80 = 5,511 : x
  2. Step 2: Convert to fraction form
    20,300.59/30,448.80 = 5,511/x
  3. Step 3: Cross multiply
    20,300.59x = 30,448.80 × 5,511
  4. Step 4: Simplify right side
    20,300.59x = 167,803,336.80
  5. Step 5: Solve for x
    x = 167,803,336.80/20,300.59
  6. Step 6: Final answer
    x = 8,265.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.